bundle agent system_files
{
  vars:
      "searchlist"  string => "iu.hio.no CFEngine.com";
      "nameservers" slist => {
                               "128.39.89.10",
                               "128.39.74.16",
                               "192.168.1.103"
      };

  files:
      "$(sys.resolv)"  # test on "/tmp/resolv.conf" #
      create        => "true",
      edit_line     => doresolv("$(s)","@(this.n)"),
      edit_defaults => empty;
      # ....

}
#######################################################

bundle edit_line doresolv(search,names)
{
  insert_lines:
      "search $(search)";
      "nameserver $(names)";
}
```
bundle agent system_files
{
      # ...

  files:
      "/etc/hosts"
      comment => "Add hosts to the /etc/hosts file",
      edit_line => fix_etc_hosts;
}
###########################################################

bundle edit_line fix_etc_hosts
{
  vars:
      "names[127.0.0.1]"    string => "localhost localhost.CFEngine.com";
      "names[128.39.89.12]" string => "myhost myhost.CFEngine.com";
      "names[128.39.89.13]" string => "otherhost otherhost.CFEngine.com";
      # etc

      "i" slist => getindices("names");

  insert_lines:
      "$(i)     $(names[$(i)])";
}